What kind of error is this?

BlitzPlus Forums/BlitzPlus Programming/What kind of error is this?

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Thank you. That must be the problem I guess (I can't verify it yet, cause someone else is running my program on their machine). Nevertheless, I think it is not neccessary to give this kind of error, when I only use the Win32 API stuff (I do not use any graphics mode that actually needs 16 bit color or better to run).